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(7x-10)+(3x+42)=360
We move all terms to the left:
(7x-10)+(3x+42)-(360)=0
We get rid of parentheses
7x+3x-10+42-360=0
We add all the numbers together, and all the variables
10x-328=0
We move all terms containing x to the left, all other terms to the right
10x=328
x=328/10
x=32+4/5
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